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Toughened Microstructures for Ductile Phase Reinforced Molybdenum Disilicide

Published online by Cambridge University Press:  22 February 2011

S. M. Packard  and
A.K. Ghosh
S. M. Packard
Affiliation:
Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109–2136.
A.K. Ghosh
Affiliation:
Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109–2136.
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Abstract

Various morphologies of ductile Nb refractory metal reinforcement are incorporated into a MoSi2 matrix using powder metallurgy, including single-ply laminates, continuous metal ribbons and sections of 2-dimensional wire mesh. Hot forging techniques are used to redistribute the reinforcement and change the dimensions and the aspect ratio of the reinforcing metal ligaments. Work-of-rupture measurements are conducted on bend test specimens and precracked tensile specimens of the composite so that the toughness contribution from the various ductile metal morphologies can be assessed according to its effectiveness. Accompanying microstructural examination of crack bridging interaction with the reinforcement is conducted.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 905
Copyright
Copyright © Materials Research Society 1995

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